345243253 has 2 divisors, whose sum is σ = 345243254. Its totient is φ = 345243252.

The previous prime is 345243211. The next prime is 345243257. The reversal of 345243253 is 352342543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233264529 + 111978724 = 15273^2 + 10582^2 .

It is a cyclic number.

It is not a de Polignac number, because 345243253 - 2¹³ = 345235061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345243257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172621626 + 172621627.

It is an arithmetic number, because the mean of its divisors is an integer number (172621627).

Almost surely, 2^345243253 is an apocalyptic number.

It is an amenable number.

345243253 is a deficient number, since it is larger than the sum of its proper divisors (1).

345243253 is an equidigital number, since it uses as much as digits as its factorization.

345243253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 31.

The square root of 345243253 is about 18580.7226178101. The cubic root of 345243253 is about 701.5227077061.

Adding to 345243253 its reverse (352342543), we get a palindrome (697585796).

The spelling of 345243253 in words is "three hundred forty-five million, two hundred forty-three thousand, two hundred fifty-three".